linux-kernel - [RFC PATCH] usb: dwc3: host: add support for OTG in DWC3 host driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 4 Jan 2017 18:52:59 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     <robh+dt@...nel.org>, <mark.rutland@....com>,
        <catalin.marinas@....com>, <will.deacon@....com>,
        <michal.simek@...inx.com>, <soren.brinkmann@...inx.com>,
        <balbi@...nel.org>, <gregkh@...uxfoundation.org>,
        <mathias.nyman@...el.com>, <agraf@...e.de>, <bharatku@...inx.com>,
        <punnaiah.choudary.kalluri@...inx.com>, <dhdang@....com>,
        <marc.zyngier@....com>, <mnarani@...inx.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
CC:     <anirudh@...inx.com>, <anuragku@...inx.com>
Subject: [RFC PATCH] usb: dwc3: host: add support for OTG in DWC3 host driver

This patch adds support for OTG host mode initialization in DWC3
host driver. Before the host initialization sequence begins. The
driver has to make sure the no OTG peripheral mode is enabled.

Signed-off-by: Manish Narani <mnarani@...inx.com>
---
 drivers/usb/dwc3/host.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index 487f0ff..4caa3fe 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -16,6 +16,8 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
 
 #include "core.h"
 
@@ -111,6 +113,18 @@ int dwc3_host_init(struct dwc3 *dwc)
 	phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
 			  dev_name(dwc->dev));
 
+	if (dwc->dr_mode == USB_DR_MODE_OTG) {
+		struct usb_phy *phy;
+		/* Switch otg to host mode */
+		phy = usb_get_phy(USB_PHY_TYPE_USB3);
+		if (!IS_ERR(phy)) {
+			if (phy && phy->otg)
+				otg_set_host(phy->otg,
+						(struct usb_bus *)(long)1);
+			usb_put_phy(phy);
+		}
+	}
+
 	ret = platform_device_add(xhci);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register xHCI device\n");
-- 
2.1.1